212228173 has 2 divisors, whose sum is σ = 212228174. Its totient is φ = 212228172.

The previous prime is 212228141. The next prime is 212228183. The reversal of 212228173 is 371822212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117029124 + 95199049 = 10818^2 + 9757^2 .

It is a cyclic number.

It is not a de Polignac number, because 212228173 - 2⁵ = 212228141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212228183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106114086 + 106114087.

It is an arithmetic number, because the mean of its divisors is an integer number (106114087).

Almost surely, 2^212228173 is an apocalyptic number.

It is an amenable number.

212228173 is a deficient number, since it is larger than the sum of its proper divisors (1).

212228173 is an equidigital number, since it uses as much as digits as its factorization.

212228173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 212228173 is about 14568.0531643731. The cubic root of 212228173 is about 596.4870395828.

The spelling of 212228173 in words is "two hundred twelve million, two hundred twenty-eight thousand, one hundred seventy-three".